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python列表操作使用示例分享
复制代码 代码如下:Python 3.3.4 (v3.3.4:7ff62415e426, Feb 10 2014, 18:13:51) [MSC v.1600 64 bit (AMD64)] on win32Type "copyright", "credits" or "license()" for more information.>>> cast=["cleese","palin","jones","idle"]>>> print(cast)['cleese', 'palin', 'jones', 'idle']>>> print(len(cast))#显示数据项数量4>>> print(cast[1])#显示列表中第2个数据项的值palin>>> cast.append("gilliam")#在列表末尾添加一个数据项>>> print(cast)['cleese', 'palin', 'jones', 'idle', 'gilliam']>>> cast.pop()#删除列表末尾的数据项'gilliam'>>> print(cast)['cleese', 'palin', 'jones', 'idle']>>> cast.extend(["gilliam","chapman"])#在列表末尾增加一个数据项集合>>> print(cast)['cleese', 'palin', 'jones', 'idle', 'gilliam', 'chapman']>>> cast.remove("chapman")#删除指定的数据项>>> print(cast)['cleese', 'palin', 'jones', 'idle', 'gilliam']>>> cast.insert(0,"chapman")#在指定的位置增加数据项>>> print(cast)['chapman', 'cleese', 'palin', 'jones', 'idle', 'gilliam']>>>
下面是讲定义一个def函数，isinstance()函数，for in，if else等的运用以及逻辑复制代码 代码如下:movies=["the holy grail",1975,"terry jone & terry gilliam",91, ["graham chapman", ["michael palin","john cleese","terry gilliam", "eric idle","terry jones"]]]def print_lol(the_list):#定义一种函数 for each_item in the_list:#for in循环迭代处理列表，从列表起始位置到末尾 if isinstance(each_item,list):#isinstance()检测each_item里每一项 #是不是list类型 print_lol(each_item)#如果是，调用函数print_lol else:print(each_item)#如果不是，输出这一项
print_lol(movies)#在movies列表中调用函数"""之前if else语句不对齐导致报错"""